| /* |
| * FILE NAME |
| * arch/mips/vr41xx/common/int-handler.S |
| * |
| * BRIEF MODULE DESCRIPTION |
| * Interrupt dispatcher for the NEC VR4100 series. |
| * |
| * Author: Yoichi Yuasa |
| * yyuasa@mvista.com or source@mvista.com |
| * |
| * Copyright 2001 MontaVista Software Inc. |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License as published by the |
| * Free Software Foundation; either version 2 of the License, or (at your |
| * option) any later version. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
| * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
| * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR |
| * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE |
| * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * |
| * You should have received a copy of the GNU General Public License along |
| * with this program; if not, write to the Free Software Foundation, Inc., |
| * 675 Mass Ave, Cambridge, MA 02139, USA. |
| */ |
| /* |
| * Changes: |
| * MontaVista Software Inc. <yyuasa@mvista.com> or <source@mvista.com> |
| * - New creation, NEC VR4100 series are supported. |
| * |
| * Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp> |
| * - Coped with INTASSIGN of NEC VR4133. |
| */ |
| #include <asm/asm.h> |
| #include <asm/regdef.h> |
| #include <asm/mipsregs.h> |
| #include <asm/stackframe.h> |
| |
| .text |
| .set noreorder |
| |
| .align 5 |
| NESTED(vr41xx_handle_interrupt, PT_SIZE, ra) |
| .set noat |
| SAVE_ALL |
| CLI |
| .set at |
| .set noreorder |
| |
| /* |
| * Get the pending interrupts |
| */ |
| mfc0 t0, CP0_CAUSE |
| mfc0 t1, CP0_STATUS |
| andi t0, 0xff00 |
| and t0, t0, t1 |
| |
| andi t1, t0, CAUSEF_IP7 # MIPS timer interrupt |
| bnez t1, handle_irq |
| li a0, 7 |
| |
| andi t1, t0, 0x7800 # check for Int1-4 |
| beqz t1, 1f |
| |
| andi t1, t0, CAUSEF_IP3 # check for Int1 |
| bnez t1, handle_int |
| li a0, 3 |
| |
| andi t1, t0, CAUSEF_IP4 # check for Int2 |
| bnez t1, handle_int |
| li a0, 4 |
| |
| andi t1, t0, CAUSEF_IP5 # check for Int3 |
| bnez t1, handle_int |
| li a0, 5 |
| |
| andi t1, t0, CAUSEF_IP6 # check for Int4 |
| bnez t1, handle_int |
| li a0, 6 |
| |
| 1: |
| andi t1, t0, CAUSEF_IP2 # check for Int0 |
| bnez t1, handle_int |
| li a0, 2 |
| |
| andi t1, t0, CAUSEF_IP0 # check for IP0 |
| bnez t1, handle_irq |
| li a0, 0 |
| |
| andi t1, t0, CAUSEF_IP1 # check for IP1 |
| bnez t1, handle_irq |
| li a0, 1 |
| |
| j spurious_interrupt |
| nop |
| |
| handle_int: |
| jal irq_dispatch |
| move a1, sp |
| j ret_from_irq |
| nop |
| |
| handle_irq: |
| jal do_IRQ |
| move a1, sp |
| j ret_from_irq |
| END(vr41xx_handle_interrupt) |